The value of `cos e c10^0+cos e c50^0-cos e c70^0` is ____

The value of cos10^@ cos30^@ cos50^@ cos70^@ cos90^@ is: cos10^@ cos30^@ cos50^@ cos70^@ cos90^@ का मान है :

cos10^(0)cos30^(0)cos50^(@)cos70^(0)

The value of cos^(2)10^(0)-cos10^(0)cos50^(@)+cos^(2)50^(@) is equal to (4)/(3)(b)(1)/(3)(c)(3)/(4)(d)3

The value of cos52^(0)+cos68^(0)+cos172^(0) is 0 b.1 c.2 d.3/2

If A+B+C=0, then the value of sin^(2)A+cos C(cos A cos B-cos C)+cos B(cos A cos C-cos B) is equal to: -1 (b) 0(c)1 (d) none of these

Evaluate : (sin50^0)/(cos40^0)+(cos e c40^0)/(sec50^0)-4cos50^0cos e c40^0

The expression (t a n A)/(1-cot A)+(cot A)/(1-t a n A) can be written as sin A cos A+1 b. s e c A\ cos e c A+1 c. t a n A+cot A d. s e c A+cos e c A

If xsin45^0cos^2 60^0=(tan^2 60^0cos e c 30^0)/(s e c 45^0cot^2 30^0), t h e n x= 2 b. 4 c. 8 d. 16

Find the values of the trigonometric function cos e c(-1410^(@)).