PLEASE HELP: Evaluate tan^2θ for θ = 60°

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Select the correct answer from each drop-down menu. rewrite the formula to find voltage. the formula for electrical power (p, in watts) is where v is the voltage in volts and r is the resistance in ohms. for a particular brand of water heater, r is 32 ohms and p is 0.5 watts. the formula to find v is , and the voltage at which the heater operates is volts.

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.

Which of the following constants can be added to x2 - 3x to form a perfect square trinomial?