What is the value of cos^2(pi/2)-3sin(pi/2) ?

The value of cos^2(pi/2)-3sin(pi/2) is -3

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cos^2(pi/2)-3sin(pi/2)

cos^{2} (\frac{π}{2}) - 3 sin (\frac{π}{2})

- 3

Solution steps

cos^{2} (\frac{π}{2}) - 3 sin (\frac{π}{2})

Use the following trivial identity:

cos (\frac{π}{2}) = 0

Use the following trivial identity:

sin (\frac{π}{2}) = 1

= 0^{2} - 3 \cdot 1

Simplify

= - 3

0.15 (9.8) (cos (3 2^{\circ})) + 0.91 (cos (5 8^{\circ}))

arcsec (\frac{2}{3})

arctan (\frac{10}{9})

arccos (0.47)

2 (4 (0)^{3} cosh (0^{2}) + 6 (0) sinh (0^{2}))

What is the value of cos^2(pi/2)-3sin(pi/2) ?
The value of cos^2(pi/2)-3sin(pi/2) is -3