Q5 of 123 Page 9

If then write the value of

Given, for the value of


Consider,



[by using the formula cos 2x = cos2 x – sin2 x]




[by using the formula cos2 x + sin2 x = 1]





As already mentioned in the question, , x is in the 2nd quadrant, where tangent function is negative.


Therefore,


More from this chapter

All 123 →
3

If then write the value of

4

If then write the value of in the simplest form.

 6

If then write the value of

7

In a right-angled triangle ABC, write the value of sin2 A + sin2 B + sin2 C.