19) Use the Half-angle Formulas to find the exact value of each expressior tan 22.5°

Q: Find the angle 0, in radians that make the equation true; tan0=0

A:

Q: Use double- and half-angle formulas to find the exact value of the expression sin 22.5°.

A: Given: sin 22.5° To find: The exact value by using double and half-angle formula.

Q: Find the exact value of expression sin 240°. Do not use a calculator.

A: Given: sin240∘ we know that  sin180∘+θ=-sinθ

Q: Find the length of a ladder leaning against a wall if the ladder is seven feet from the wall and has…

A: Draw a diagram depicting this scenario . Then, use the cosine relation to find the height of the…

Q: Use reference angles to find the exact value of the expression cot(7π/4). Do not use a calculator.

A: Given expression is cot7π4.

Q: Sketch the angle and write the sec and tan of the angle if the terminal side of the angle passes…

A: NOTE: Refresh your page if you can't see any equations. . the given point is so here we have

Q: Use Half-angle Formulas to find the exact value of each expression; sin 195°

A: Given,       sin195°=

Q: Use Half-angle Formulas to find the exact value of each expression; sin 22.5°

A:

Fundamentals of Trigonometric Identities

Trigonometric Identities are the equalities that involve trigonometry functions and hold for all the values of variables given in the equation.