If for any acute angle A, sin A + sin A = 1, then the value of cos A – McqOptions

MCQOPTIONS

1.	If for any acute angle A, sin A + sin A = 1, then the value of cos A + cos⁴ A is
A.	- 1
B.	1
C.	2
D.	0
Answer» C. 2

Discussion

No Comment Found

Related MCQs

The angles of elevation of an aeroplane flying vertically above the ground, as observed from the two consecutive stones, 1 km apart; are 45 and 60 aeroplane from the ground is :
If the angle of elevation of the top of a pillar from the ground level is raised from 30 to 60 , the length of the shadow of a pillar of height 50 <span style=" text-decoration: overline;">3</span> will be decreased by
From a point P on a level ground, the angle of elevation to the top of the tower is 30 . If the tower is 100 metre high, the distance of point P from the foot of the tower is (Take <span style=" text-decoration: overline;">3</span> = 1.73)
Find the angular elevation of the Sun when the shadow of a 15 metre long pole is (15 / <span style=" text-decoration: overline;">3</span>) metre.
If A is an acute angle and cot A + cosec A = 3, then the value of sin A is
If x = a sec and y = b tan then <br><table><tr><td rowspan="2"></td><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>a </center></td><td rowspan="2">-</td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>b </center></td><td rowspan="2">= ?</td></tr><td align="center">x </td><td align="center">y </td></table>
The value of tan 11 tan 17 tan 79 tan 73 is
If sin + sin = 1, then the value of cos<sup>2</sup> + 3 cos<sup>10</sup> + 3 cos<sup>8</sup> + cos<sup>6</sup> 1 is
If for any acute angle A, sin A + sin A = 1, then the value of cos A + cos<sup>4</sup> A is
If 0 90 and 4 cos 4 <span style=" text-decoration: overline;">3</span> cos + 3 = 0 then the value of is